“Remember when I mentioned the alchemist’s wife who came back from the dead, and the rubber-clad figure that appeared and disappeared out of thin air?”

Li Ang pinched the key ring he got from room e with two fingers, flicking it to make the seven keys jingle.

“These seven keys correspond to rooms A, B, C, d, e, f, and g.

Each one is marked with a number on the back:

0, -72, 72, -24, -48, -2, -0.

At first, I couldn’t understand the meaning of these numbers. I thought they were the combination for a digital lock, or a rotary combination lock on a safe.

Until I entered room f at 10:05 and got the letter.”

He said slowly, “The letter in room f asked me to put the sugarcane into the feeding port in room f, so that the machine in room A could produce battery fluid.

It also claimed that producing the battery would take at least two hours.

If I couldn’t enter room f before ten o’clock, I would miss the last chance.

However, there’s something very unreasonable about this letter.

Whoever left the letter, they accurately predicted the time I would enter each room.

They even calculated the time I would spend exploring the tunnel, and the time I would be distracted by the rubber-clad figure.

Except in room f.

Even though I didn’t waste any time along the way, and was only five minutes late, it said that I had already exceeded the final time limit.

Either remove the battery from my shoulder and put it in the stone wall slot, gambling my life,

Or do nothing and wait to die.”

Li Ang paused, and said calmly, “That’s very strange.

On the floor of room f, there was a sugarcane.

Combining this with my previous speculation, the so-called battery fluid is actually L-glucose, which provides me with energy.

If that’s the case, why didn’t I just eat the sugarcane, which could provide me with sugar, and then safely remove the battery from my shoulder and put it in the stone wall slot?

There’s absolutely no need to go through the step of turning on the machine in room A.

Unless, the sugarcane hadn’t completed the chirality conversion step,

Making it impossible for me to directly eat the sugarcane, use the sugar in it, and provide energy to my body.

I have to follow the steps in the letter.”

Li Ang raised his arm and tapped the half-open stone wall with his knuckles, saying lightly, “The most critical node in the entire Möbius tunnel is this stone wall.

Pass through the stone wall to convert chirality,

And when you walk out again, it becomes normal.

The sugarcane appeared on the floor of room f, but its chirality was normal.

There are two possibilities to explain this.

The sugarcane was secretly brought in, placed inside this rubber suit that could isolate the tunnel’s chirality reversal effect.

There is some kind of secret passage in this tunnel that can directly enter the room from the outside, without going through the stone wall.

Although this rubber suit I’m wearing is missing some parts and can’t isolate the chirality reversal effect,

It’s very tight inside, and can’t fit a sugarcane as long as an arm at all.

Moreover, there are no traces of wear, sweat stains, or rubber odor on the surface of the sugarcane.”

Li Ang shook his head and said, “Then, only the second possibility remains, that there is a secret passage in the tunnel.

I searched all the rooms, and the most likely candidates for secret passages are the square metal plates on the ceilings of rooms d and e.

The figure wearing the same rubber suit as me first appeared when walking out of the stone wall from the tunnel.

The second time was when walking into the door of room d.

The third time was carrying a deformed monster across the stone wall.

At first, I thought the deformed monster existed inside room d, but after considering that there is a secret passage leading to the outside in room d, there is a new explanation.

The deformed monster was carried down from upstairs by the rubber-clad figure.

The numbers on the back of this key ring aren’t a password, but the time corresponding to each room in the outside world.

The time in room A is the same as the time in the outside world.

The time in room B is 72 hours before the outside world.

The time in room C is 72 hours after the outside world.

The time in room d is 24 hours before the outside world.

The time in room e is 48 hours before the outside world.

The time in room f is 2 hours before the outside world.

The time in room g is the same as the time in the outside world.

In this way, all the unreasonableness is explained.

I heard you and your father talking in room C. At that time, it was 9:30 p.m. on March 7th. Your father decided to go down into the well and carry out the final plan.

Deducting 72 hours from this, the time in the tunnel at that time should have been 9:30 p.m. on March 4th.

At 9:15 p.m. on March 4th in tunnel time,

The conversation between the couple I heard in room B actually took place at 9:15 p.m. on March 1st. At that time, the alchemist’s wife was comforting her husband, and everything was normal.

At 9:45 p.m. on March 4th in tunnel time,

I heard the alchemist crying in room d, which actually happened at 9:45 p.m. on March 3rd.

Moreover, at 9:15 p.m. on March 3rd, someone lured you and your mother away.

At 9:40, he took Shili away.

Between 9:40 and 9:45, your mother died.

The conversation between the alchemist and his wife that I heard in room e actually took place at 9:55 p.m. on March 2nd.

Corresponding to what the alchemist wrote on the calendar, he went to Amestris on March 2nd to receive a medal for his wife.

After sorting out all the above times, the correct timeline in the outside world should be:

March 1st, the alchemist gave Alice, that is, you, the third quarter Turing test. The weather was terrible the day before, destroying his experimental samples.

March 2nd, the alchemist went to Amestris. Shili had a nightmare at night, dreaming that there was someone in the cupboard. The couple talked at 9:55, and the alchemist gave the medal to his wife.

March 3rd, at 9:15 p.m., someone lured you and your mother away. At 9:40, he took Shili away, which led to your mother’s death. At 9:45, the alchemist talked to you.

March 7th, at 9:30 p.m., the alchemist had tried all the methods, but still couldn’t produce the correct medicine, so he prepared to go down into the well.”

Li Ang raised his index finger and said in a deep voice, “At this time, his wife and daughter were already dead, so why did he still say he wanted to make medicine? Why did he still say he wanted to save his wife and daughter?

The answer is simple, he wants to use the time distortion ability of the tunnel to go back to the past and save the tragedy.

On that calendar, the notation for March 3rd is to listen to the summary of myself three days later.

The notation on the calendar was obviously before March, before the tragedy happened. At that time, the alchemist didn’t know his wife and daughter would die.

At 9:15 p.m. on March 3rd, someone who looked like the alchemist appeared and lured you and your mother away.

Where was the alchemist himself at this time?

He should be in room C, listening to the summary of himself three days later.

The alchemist had long known about the time anomaly in the tunnel and had been using it all along.

Every once in a while, he would stay alone in room C of the tunnel.

Since the time in room C is 72 hours after the outside world,

As long as he made it a habit to recite his experimental results and insights in the past few days on the ground room above room C on time,

He could avoid many detours, save time in disguise, and strive to develop the drug as soon as possible.

The other rooms were also made into a format that could hear the sounds from upstairs, probably for the same purpose.”